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What's The Matter?! (7GC1) Flashcards | StudBud
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What's The Matter?! (7GC1)
What's The Matter?! (7GC1)
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Answers
1
Dalton's theory of atoms said that the masses of elements in a compound are always
in a constant ratio
in a 4 to 1 ratio
in a 2 to 1 ratio
equal
2
Iron can be obtained from a compound of iron and oxygen by
breaking iron ore into small pieces
electrolysis
heating the compound and carbon together
panning
3
All of the following are examples of properties EXCEPT
symbols
color
flammability
hardness
4
The density of a block of wood with a volume of 50 ml and a mass of 100 grams is
2 g/ml
500 g/ml
0.5 g/ml
5.000 g/ml
5
Substances that cANNO"T be broken down chemically into other substances are
mixtures
elements
liquids
compounds
6
One example of a chemical change is
cutting up paper
crushing a can
burning gasoline in an engine
boiling water
7
A change that produces one or more new substances is called a physical change.
True
False
8
A molecule can contain as few as two atoms or more than a million atoms.
False
True
9
The measurement of how much matter an object contains is its
volume
mass
weight
density
10
Which type of matter consists of two or more substances that are NOT chemically combined?
mixtures
compounds
atoms
elements
11
The measurement of the force of gravity on an object is the object's
mass
volume
weight
density
12
What holds atoms together in a molecule
temperature
density
chemical bonds
gravity
13
The smallest particle of an element is called an atom.
False
True
14
If you landed on the moon, your weight there would be the same as when you are on earth.
False
True
15
A symbol shows the ratio of elements in a compound.
False
True
16
One example of a physical change is
baking cookies
mixing a milkshake
the rusting of iron
burning iron
17
Which of the following statements about the properties of matter is true?
The properties of all mixtures are the same
The properties of specific kinds of matter frequently change
All kinds of matter have the same properties
Each specific substance can be identified by its properties
18
According to Dalton's theory of atoms, all atoms in any element
have a different mass
are different
are exactly alike
can be broken into smaller pieces
19
Chemistry is the study of the properties of matter and the changes matter can undergo.
False
True
20
All elements are composed of extremely small particles called
mixtures
molecules
atoms
compounds
21
Which of the following does NOT describe a property of water?
In liquid form, it is clear and colorless
At temperatures of 100 or higher, water changes into a gas
Ice is water in its solid form
Water is made of only one kind of atom
22
How would you calculate the density of an object
Multiply its weight times its mass
Divide its mass by its volume
Multiply its volume times its mass
Divide its weight by its volume
23
The measurement of the amount of mass contained in a given volume is called
liter
kilogram
density
weight
24
What is alchemy?
science of studying molecular structures
the study of all chemistry
the science of attempting to turn plain metals into gold
breaking atoms apart
25
The SI unit for mass is
liter
ounce
pound
kilogram
26
Why can gold be easily separated from other materials in a mixture?
It is shiny
It has a high volume
It has a high density
It has a high mass
27
Who was Democritus
The man who propsed the first "atomic" theories
A greek god
A famous Russian scientist
The scientist who proposed the scientific theory of alchemy
28
What technique did miners use to separate gold from sand and dirt?
melting
heating along with charcoal
panning
electrolysis
29
An electric current breaks the chemical bond in a process called
melting
panning
electrolysis
heating along with charcoal
30
The first person known to propose the idea that matter is made of "atoms" was
Asimov
Dalton
Democritus
Fahrenheit
31
Which of the following is NOT true of a compound?
It contains elements that are chemically combined
It is made of two or more elements
substances in the compound keep their individual properties
It contains elements combined in a specific ratio
32
A group of atoms that are bonded together is called a(n)
element
mixture
compound
molecule
33
In chemistry, elements are represented by
symbols
building blocks
formulas
ratios
